[c-nsp] 6509 / 3750 link problem

[Phil Mayers]

Glenn Tan wrote:
> Hi
> 
> I am having a strange problem here...
> We're trying to connect to an uplink's Catalyst 3750 from one of our
> 6509 SUP720s via 1000base-LX over single-mode fiber and we are having
> this weird problem where our router shows the interface as down/down,
> whereas their router shows the interface as up/up.
> 
> We have tested every portion of the fiber pair linking both switches
> and have found nothing wrong. The wavelengths are both the same,
> signal strengths are well within normal ranges, and all cable loopback
> tests are successful and indicate no problems.
> 

autoneg?